EXAMPLE - LIST Function

You have the following set of orders for two months, and you are interested in identifying the set of colors that have been sold for each product for each month and the total quantity of product sold for each month.

Source:

OrderId

Date

Item

Qty

Color

1001

1/15/15

Pants

1

red

1002

1/15/15

Shirt

2

green

1003

1/15/15

Hat

3

blue

1004

1/16/15

Shirt

4

yellow

1005

1/16/15

Hat

5

red

1006

1/20/15

Pants

6

green

1007

1/15/15

Hat

7

blue

1008

4/15/15

Shirt

8

yellow

1009

4/15/15

Shoes

9

brown

1010

4/16/15

Pants

1

red

1011

4/16/15

Hat

2

green

1012

4/16/15

Shirt

3

blue

1013

4/20/15

Shoes

4

black

1014

4/20/15

Hat

5

blue

1015

4/20/15

Pants

6

black

Transform:

To track by month, you need a column containing the month value extracted from the date:

set col:Date value:DATEFORMAT(Date, 'MMM yyyy')

You can aggregate the data in your dataset, grouped by the reformatted Date values, and apply the LIST function to the Color column. In the same aggregation, you can include a summation function for the Qty column: